School of Psychological Sciences and Health, University of Strathclyde, UK.
Addict Behav. 2012 Jan;37(1):92-101. doi: 10.1016/j.addbeh.2011.09.005. Epub 2011 Sep 8.
This study provides a comparative test of the one- and two-component theories of planned behavior (TPB) in the context of university undergraduates' binge-drinking. Participants (N=120) self-completed questionnaire measures of all TPB constructs at time 1 and subsequent binge-drinking at time 2 (two-weeks later). The data were analyzed using a combination of path analyses and bootstrapping procedures. Both models accounted for a substantial proportion of the variation in behavior. However, the two-component TPB provided a significantly better fit to the data, with the total direct and indirect effects accounting for 90% of the variance. Intention was the only direct predictor of behavior. Instrumental attitude, affective attitude and self-efficacy had indirect effects. Although health interventions could usefully target these cognitive antecedents, simulation analyses, modeling the effects of cognition change on behavior, showed that only large-sized (0.8 SD) changes to affective attitude, or moderate-sized changes to all of these cognitions in combination were sufficient to reduce binge-drinking.
本研究在大学生豪饮的背景下，对计划行为理论（TPB）的单因素和双因素理论进行了对比测试。参与者（N=120）在第一次时自我完成了所有 TPB 结构的问卷测量，然后在两周后的第二次测量了豪饮行为。数据采用路径分析和自举程序的组合进行分析。两种模型都能很好地解释行为的变化。然而，双因素 TPB 对数据的拟合效果更好，总直接和间接效应解释了 90%的方差。意图是行为的唯一直接预测因素。工具性态度、情感态度和自我效能感具有间接影响。虽然健康干预可以有效地针对这些认知因素，但模拟分析表明，只有对情感态度进行较大幅度的（0.8SD）改变，或者对所有这些认知因素进行适度的改变，才能减少豪饮行为。
